OBD-II code · Powertrain (generic, extended)
P242E Exhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 1 Sensor 3
Same as P242A with intermittent or erratic signal. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P242E?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIntermittent contact at connector
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–1.8 h
- Emissions test
- Likely to fail
- Parts involved
- Egt Sensor B1s3
Related codes
- P246AExhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 2 Sensor 3
- P2477Exhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 2 Sensor 4
- P2484Exhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 1 Sensor 5
- P2489Exhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 2 Sensor 5
- P242BExhaust Gas Temperature Sensor Circuit Range or Performance Bank 1 Sensor 3
- P242CExhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 3
- P242DExhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3
- P242FParticulate Filter Restriction Ash Accumulation Bank 1
- P2430AIR System Air Flow or Pressure Sensor Circuit Bank 1
- P2431Secondary Air Injection System Air Flow/Pressure Sensor Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.